- Zepos & Zepos has merged with C. Yannopoulos & Associates, the leading tax law firm in Greece. The resulting entity is called Zepos & Yannopoulos and the new website is located at www.zeya.com Established in 1893, Zepos & Yannopoulos is one of the leading and largest law firms in Greece providing comprehensive legal and tax advice to companies conducting business in Greece. Zepos & Yannopoulos ...zeya.com